Assertion: The method of development of embryo sac from a single functional megaspore is termed as monosporic development.
Reason: In monosporic type of embryo sac development, usually the megaspore which is situated towards the micropylar end remains functional.
(a) Assertion and Reason are true and Reason is the correct explanation of Assertion.
(b) Assertion and Reason are true and Reason is not the correct explanation of Assertion.
(c) Assertion is true but Reason is false
(d) Both Assertion and Reason are false
Reason: In monosporic type of embryo sac development, usually the megaspore which is situated towards the micropylar end remains functional.
(a) Assertion and Reason are true and Reason is the correct explanation of Assertion.
(b) Assertion and Reason are true and Reason is not the correct explanation of Assertion.
(c) Assertion is true but Reason is false
(d) Both Assertion and Reason are false
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Answer:
If assertion is true but reason is false
Explanation:
In monosporic (Polygonum) type of development of embryo sac, only one megaspore situated towards chalazal end remains functional. The remaining three megaspores gradually degenerate and finally disappear. The functional haploid megaspore enlarges in size and by means of three successive mitotic divisions, gives rise to an eight-nucleate embryo sac. This type of embryo sac development occurs in a majority of flowering plants and the common example is Polygonum.
Answer:
C
assertion is true but reason is false